Power transmission.



No. 820,122- I v PATBNTED MAY 8, 190's. G. MORRIGE & o. G. GRIM.

POWER TRANSMISSION.

APPLIOATION FILED IEZBJQ. 1906.

UNITED STATES PATENT OFFICE.

POWER TRANSMISSION.

Specification of Letters Patent.

Patented. May 8, 1906.

Application filed February 10, 1906. Serial No. 245,156.

To all whom it may concern:

Be it known that we, GEORGE MORRIOE and CHARLES G. GRIM, citizens of theUnited States, residing at Sonora, in the county of Tuolumne and Stateof California, have invented new and useful Improvements in PowerTransmission, of which the following is a specification.

Our invention relates to an improved ower-transmission mechanism, andespecially to a friction-gear. Its object is to provide afriction-clutch mechanism for use in conjunction with mining-hoists andespecially with hoists run by a gasolene-engine, and to provide a clutchmechanism that can be applied direct to the engine-shaft, doing awaywith all belting and like connections, and which mechanism will besimple, safe, and practical, rendering it possible to lower a skip orcage safely even when the engineshaft is running full speed in anopposite direction.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the accompanying drawings, in which- Figure 1 is a planview of engine and hoist, showing application of our invention. Fig. 2is a sectional view of clutch mechanism.

A represents an engine-shaft or other power-shaft run constantly orotherwise, and 2 illustrates a hoisting-drum to which power to rotate itis to be applied intermittently. Turning loose on shaft A and heldagainst longitudinal movement thereon by a collar 3 is an idle pinion 4,provided on the end oppo site collar 3with a half-friction 5. Pinion 4is in constant mesh with a gear 2 on drum 2. 6 is a corresponding femalefriction member sliding on a feather 7 on and turnable with the shaftand adapted when moved up into tight frictional contact with member 5 torevolve the latter and pinion 4 and drum in unison, the speed of thepinion and drum depending on the load and on the closeness of thefrictional contact of the members. It is to be observed that thefrictional surfaces of members 5 6 are doublethat is, the friction areaof member 6 is in the form of an annular groove 6 and the part 5 in theform of an annulus fitting the groove of member 6. The

' member 6 is movable into engagement with member 5 by means of across-piece 8, operating in a transverse slot 9 in the shaft, a rod 101n a central passage-may 11 in the end of the shaft engaging with thecross-piece 8 and a screw 12 bearing against the rod 10. The cross-piece8 is kept in position by the flange 6 on member 6. The rod 10 is for thepurpose of preventing crystallization of the other metal parts. Theouter end of the screw is threaded and turns in a threaded support 13,carried on rods 14, from the adjacent end journal-box of the shaft andadjustable by means of the set-nuts 15. The rotation of the screw ineither move the clutch member 6 into and out of engagement with member 5and is done by suitable means, as the arm 16, locked to the screw, andthe link 17, connecting arm 16 and another arm on the lever-shaft 18.

Among the advantages of this construction maybe mentioned the following:The friction being made double-faced and conical and the concavity ofmember 6 prolonged, a large extent of friction-surface is afforded andprovision is made for take up of anywear. Great power is obtained for aminimum amount of weight. A saving in power is effected by reason of thedirect connectionwith the driveshaft. The device is absolutely safe evenwhen applied to a gasolene-engine which is recognized as most unreliablefor hoisting on account of the liability to miss sparking. Power can berun at full speed, and the skip or cage can be raised or lowered just asslow or as fast as desired and without a brake. The friction beingdouble makes the clutch very sensitive and at the same time so powerfulthat in the event of the power running away from any cause whatever, asin use with a hoist, the skip can be lowered to any depth with safety,though the power may be running full speed in the opposite direction.The construction is such that it can readily and quickly be applied toany shaft.

It is possible that various modifications in our invention may be madewithout departing from the principle thereof, and we do not wish to beunderstood as limiting ourselves to the specific construction as hereinshown and described.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

The combination of an engine-shaft, a gear loose on said shaft andhaving a member of a clutch, afemale clutch member slidable on the shaftand adapted to engage the clutch member of the loose gear said shafthaving a central passage-way, a rod slidably mounted in direction issufficient to said passage-Way of the shaft, and provided our hands inpresence of two suhsrihing witwith a cross-piece, a screw in line withthe nesses.

- rod and made separate therefrom and bear- GEORGE MORRICE. lng endwlse.thereon, and means for ad ustlng the screw, said slidable clutch memberhav- CHARLES GRIM' ing an integral flange for housing the ends ofWitnesses:

the cross-piece. PERCY HODGEs, In testimony whereof we have hereunto setJ AS. L. R001.

